Plastic scoop for separable fastener stringers



Sept. 25, 1962 H. MORIN 3,055,069

PLASTIC SCOOP FOR SEPARABLE FASTENER STRINGERS Filed April 5. 1960 INVEN TOR. Lou/5 Mom/v BY H TTORNE Y i tts Louis H. Morin, Bronx, N.Y., assignor to Coats & Clark Inc, New York, N.Y., a corporation of Delaware Filed Apr. 5, 1%9, Ser. No. 20,062 1 Claim. (Cl. 24-20513) This invention relates to scoops of separable fastener stringers, preferably formed of plastics, such as Deirin. More particularly, the invention deals with scoops of the offset center ledge-type, wherein the interlocking portions of the scoops are disposed at one side thereof and the opposed side of each of the scoops includes a strong rib joining the coupling side portions in flared fillets.

Still more particularly, the invention deals with a scoop structure, wherein the last named side of each scoop includes laterally extending shoulders having relieved or bevelled corner portions.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

FIG. 1 is an enlarged plan view of one side f a scoop made according to my invention detached.

FIG. 2 is a side view of the structure shown in FIG. 1.

FIG. 3 is an end view of the coupling end portion of the scoop.

FIG. 4 is a sectional view through a few coupled scoops, the section being substantially on the line 4-4 of FIG. 6.

FIG. 5 is a sectional view of a few coupled scoops, the section being substantially on the line 5-5 of FIG. 4, with parts of the construction broken away.

FIG. 6 is a plan view showing two scoops of one stringer and one scoop of an opposed stringer in coupled relationship with each other and indicated, in dotted lines, positioning of lock lugs of a lock yoke used in conjunction with stringers of the character described; and

FIG. 7 is a bottom plan View of the lug end portion of a lock yoke employed in conjunction with stringers of the character defined.

Considering FIGS. 1 to 5, inclusive, it will appear that each scoop is of identical construction and the scoop, as seen in FIGS. 1, 2 and 3 of the drawing, will be generally identified as the scoop 10 and the brief description of one scoop will apply to all of the several figures. However, for clarity, the added scoops illustrated in FIGS. 4, 5 and 6 will be further identified as scoops 10, 1t) and 10". Considering FIG. 6 of the drawing, it will appear that scoops 1i) and 10 are mounted on a tape 11 having a beaded edge 12; whereas, the scoop 10" is arranged on a tape 11' having a beaded edge 12'.

Now returning to the specific showing in FIGS. 1 to 5, inclusive, it will appear that each scoop has a mounting end portion 13 which is formed upon the tape and tape bead, this mounting end portion or the opposed walls 14 and 15 thereof having apertures, as at 16, to facilitate sewing of the scoops to the stringer tapes by stitchings passed through said apertures but, as this feature of the present disclosure forms no part of the present invention, no illustration of this sewing is indicated in FIG. 6 of the drawing in order to simplify the illustration.

Extending from the wall 14 of the mounting end portion 13 is the coupling end portion 17' of the scoop,

Patented Sept. 25, 1962 said coupling end portion having the more or less diamond-shaped coupling head 18, inwardly of which are the opposed recesses 19 receiving the heads 18 of adjacent stringers, as will be apparent from a consideration of FIGS. 4, 5 and 6 of the drawing.

Inner side surfaces of the heads 18 are flat or of what may be termed a Zero angle, as indicated at 20 to establish a positive coupling engagement between coupled scoops, as will appear from the engagement at 20' in FIG. 5 of the drawing. At this time, it is pointed out that Delrin, for example, has very slippery properties and, by providing these flat engaging surfaces, the tendency to slip is resisted.

Extending integrally from the other side 15 of the mounting end portion 13 of each scoop are shoulder portions 21 which overlie the heads 18 f adjacent scoops in retaining coupled stringers against transverse separation, as with other scoops of this type and kind. Corner portions of these shoulders are recessed or beveled, as clearly seen at 22 in FIGS. 3 and 4 of the drawing. Extending integrally from the outer surface 23 of the shoulder portions 21 is a reinforcing rib 24, opposed side surfaces 25 of which are slightly tapered, as clearly illustrated in FIG. 3, simply to facilitate casting. Side surfaces 25 may be considered to be substantially at right angles to the plane of shoulder portions 21 and these surfaces at the base of the ribs join outwardly flared fillets '26, which provide a strong and secure mounting of the ribs upon the inner surfaces 27 of the coupling end portions 17 of the scoops, as clearly illustrated in FIG. 4. Also in this figure, it will appear that the adjacent surfaces 23 of the shoulder portions 21 are spaced apart when scoops of a pair of stringers are coupled together.

Considering FIG. 2 of the drawing, it will appear that the outer surface of the shoulders 21 and rib 24 are in common alinement, but join the mounting end portion of the scoop or the side 15- thereof in an offset, as indicated at 29 in said figure.

It will appear, from a consideration of FIG. 6 of the drawing, that surfaces 23 of the shoulders 21 are spaced apart a slight extent when scoops of pairs of stringers are coupled together, thus providing free movement of the scoops with respect to each other in coupling and uncoupling the scoops. -It will also appear that the ribs 24 are spaced with respect to adjacent side surfaces of scoops of the companion stringers. For purposes of description, that part of the scoops extending beyond the beaded edges 12, 12' of the scoops will be defined as the coupled Zone of the scoops, as indicated by the arrows 30 in FIG. 6 of the drawing.

It is in connection with this coupled zone that the lugs of lock yokes of sliders are adapted to operate with scoops of the type and kind defined as more clearly set forth in a companion application dealing with the lock yokes referred to, which application is filed of equal date herewith. However, in order to illustrate at least in part the engagement of the lugs with the coupled stringers, a bottom view of the lug end portion of a lock yoke is illustrated at 31 in FIG. 7 of the drawing and at 32, 33 and 34 are illustrated the longitudinally spaced and staggered lugs of the yoke arranged centrally and longitudinally of the yoke with inner surfaces 35 of all of the lugs in common longitudinal alinement centrally of the yoke. The lugs 32, 33 and 34- have been indicated diagrammatically in their engaging position in dotted lines in FIG. 6 of the drawing to illustrate arrangement in the coupled zone to operatively engage the surfaces 25 of the ribs 24 in securely retaining a slider in position on coupled stringers. At this time, it is also pointed out that the bevelled portions 22' on the 3 shoulders 21, in addition to facilitating coupling engagement of the scoops and bending of the stringers, also provide bevelled Wall portions, over which the lugs 32, 33 and 34 are free to ride in movement of these lugs into locking engagement with the ribs 24, as more clearly set forth in said companion application.

By virtue of the offsetting and staggering of the lugs 32, '33 and 34, looking engagement is established with the three adjacent coupled scoops, as illustrated in FIG. 6 of the drawing.

For purposes of description, the coupling end portion 17 of the scoops may be said to define the coupling half of the scoops; whereas, the opposed half, having the ribs 24 thereon, may be said to define the slider locking half of the scoops, this last named half including the shoulder portions 21 cooperating with the coupling heads 18 of the coupling half for retaining coupled stringers against transverse separation, it being understood that the engaged coupling heads, as illustrated in FIG. 5, retain the stringers against lateral or pull apart Separation. These interengaging and cooperating portions of the scoops are arranged within the coupled zone 30, as are also the ribs 24.

With my improved scoop, it will appear that the outer end of the ribs extend to and are flush with the outer ends of the coupling end portions. Further, the ribs are of a depth substantially equal to the depth of said coupling end portions and both of these phases of construction will clearly appear from a consideration of FIGS. 4 and 6 of the drawing.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

A separable fastener stringer scoop, comprising a cast unitary scoop body, said body having a mounting end portion and a coupling end portion, one half of the coupling end portion having a coupling head, inwardly of which are recesses for receiving the coupling heads of adjacent scoops of coupled stringers, the other half of the coupling end portion of the scoop having side shoulders cooperating with the heads of adjacent scoops of coupled stringers, a central projecting reinforcing rib extending integrally fr m the coupling head of the coupling end portion, outer surface corner portions of said shoulders being bevelled, said coupling head adapted to be spaced from the side shoulders of a corresponding coupled scoop, and said rib having sloping side walls with outer portions substantially at right angles to the plane of said shoulders and inner flat bevelled portions of substantial area adjacent to said shoulders, the dis tance between the bottom of each recess and the outer edge of each shoulder of said scoop being greater than the distance between the outermost portion of each inner fiat bevelled portion and the outer edge of said head, thereby enabling said sloping side walls to engage the outer edges of the heads of coupled scoops to insure said spacing between said coupling heads and said side shoulders.

References @ited in the file of this patent UNITED STATES PATENTS 2,067,735 Silberman Jan. 12, 1937 2,355,996 Morin Aug. 15, 1944 2,720,015 Morin Oct. 11, 1955 2,790,223 Morin Apr. 30, 1957 2,798,274 Morin July 9, 1957 2,798,275 Morin July 9, 1957 

